论文部分内容阅读
在描述鳞片、背鳍条和矢耳石三种材料轮纹特征的基础上 ,比较了这些年龄鉴定材料在判读错鄂裸鲤年龄和反映生长特征上的异同。在个体早期生长阶段 ,耳石轮纹阻断、8龄以上个体鳞片上年轮环纹的缺失和背鳍条出现轮纹的重叠是影响错鄂裸鲤年龄准确判读的主要因素。采用耳石和鳞片的体长退算数据 ,VonBertalanffy方程较好地描述了错鄂裸鲤的生长。由于背鳍条的生长在个体的生长过程中始终呈现为负的异速生长 ,因此耳石、鳞片在解释个体生长时优于鳍条
On the basis of the description of the wheel pattern characteristics of scales, dorsal rays and otoliths, the similarities and differences between the age-identifying materials and the characteristics of growth and reproduction were compared. In the early stage of individual growth, otolith ring block, the absence of annular rings on the scales of individual individuals above the age of 8 and the overlapping of ring patterns on the dorsal fin rays are the main factors affecting the accurate interpretation of the age of the erose carp. Body length using otolith and scale regression data, VonBertalanffy equation better describes the growth of false naked carp. Because dorsal fin growth in the individual’s growth process has always shown a negative allometric growth, so the otolith, scales in the interpretation of individual growth superior to the fin